2003LimitedBanshee Posted July 3, 2006 Report Share Posted July 3, 2006 I just bought a Noss Machine cylinder head for my 99 banshee. I called them and they said that I wont need to use a head gasket with this head. So now I am wondering how can those o rings take the heat and cylinder pressure that will be put on them and last. And has anyone had any problems with them so far as reliability. Im sure they will work fine I just wanted someone's opinion on them. First, O-rings are the sealing method of choice in high compression engines. My experience in high compression engines comes from supercharged small block chevy applications, and at high cylinder pressures, standard cylinder head gaskets will start to be pushed out. The next step (and it is expensive, is to have the block and heads milled for O-rings. So, yes they will take the pressure, heat etc. fine. Obviously at some point they will need to be serviced, but they should hold up for some time. As David mentioned, you will definitely want to run race gas with those domes. Is your bike ported, as that will help to lower your cylinder pressures. But, FYI I am running 20cc domes on my unported bike, and it pumped out 175 psi at 1965' elevation (guesstimate near 190 psi range at sea level). And Glamis, although I've yet to ride there, is below sea level I believe. You'll probably want to get your crank welded soon so that you don't scatter it. I've haven't done mine yet, but I've only got one trip to the dunes on it, with one more planned before I port my cylinders and I'm welding mine up at that point. You're going to love that head, I couldn't believe how much it improved the bottom end on mine! Quote Link to comment Share on other sites More sharing options...
DIRTMAN350 Posted July 4, 2006 Report Share Posted July 4, 2006 Have a Noss head here with no problems yet in two years. Just take your time insalling everything and you'll be ok. Quote Link to comment Share on other sites More sharing options...
dlnoss Posted July 4, 2006 Report Share Posted July 4, 2006 A lot of people get away with 18cc domes and a stock crank but some don't. I wouldn't drop the clutch with it rev'ed way up, with really good traction until the crank is welded. Run the highest octane race gas you can get if you have that Dyna cranked up. -David Quote Link to comment Share on other sites More sharing options...
FMS50 Posted July 4, 2006 Author Report Share Posted July 4, 2006 A lot of people get away with 18cc domes and a stock crank but some don't. I wouldn't drop the clutch with it rev'ed way up, with really good traction until the crank is welded. Run the highest octane race gas you can get if you have that Dyna cranked up. -David Ok I wont worry about grtting the crank welded yet. But when the crank goes will it destroy anything besides it's self . Quote Link to comment Share on other sites More sharing options...
RILS Posted July 5, 2006 Report Share Posted July 5, 2006 Ok I wont worry about grtting the crank welded yet. But when the crank goes will it destroy anything besides it's self . Depends on how your luck runs. Quote Link to comment Share on other sites More sharing options...
differentstrokes Posted July 5, 2006 Report Share Posted July 5, 2006 I bought a noss head too, I have yet to use it but it sure looks good on my bench. :beer: Quote Link to comment Share on other sites More sharing options...
FMS50 Posted July 5, 2006 Author Report Share Posted July 5, 2006 I bought a noss head too, I have yet to use it but it sure looks good on my bench. :beer: What size domes did you get ? Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 6, 2006 Report Share Posted July 6, 2006 Ok I wont worry about grtting the crank welded yet. But when the crank goes will it destroy anything besides it's self . You have a 95% chance of it taking something with it... If you're going through the steps to weld that crank, I'd freshen up the top end, too. Actually...check the compression first...maybe just a hone and rering if everything is in spec. Quote Link to comment Share on other sites More sharing options...
2003LimitedBanshee Posted July 6, 2006 Report Share Posted July 6, 2006 Ok I wont worry about grtting the crank welded yet. But when the crank goes will it destroy anything besides it's self . Most likely yes. If you scatter it at high RPM's you could potentially scrap the whole thing. Like said above, depends on your luck. For the $55 or so (if I remember right?) plus some time in splitting the cases, I wouldn't chance it. :baseball_bat: Quote Link to comment Share on other sites More sharing options...
differentstrokes Posted July 6, 2006 Report Share Posted July 6, 2006 What size domes did you get ? 19cc and I'm at about 500 to 700ft in elevation (lots of hills). I'm running a mild GYTR cdi, but my motor is apart so I haven't decided whether to run 100 ($4.25/gal) or 110($5.39/gal). I just wanted to give the race gas a try so I went with the 19cc's to start with. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted July 6, 2006 Report Share Posted July 6, 2006 With 19cc domes, a fresh motor and a mild CDI...110 would be your safe bet. Quote Link to comment Share on other sites More sharing options...
differentstrokes Posted July 7, 2006 Report Share Posted July 7, 2006 I'll probably give the 110 a try, it's actually a little easier to get since a local citgo sells it at the pump and I'd have to go to the airport to get the 100 av gas. Quote Link to comment Share on other sites More sharing options...
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